Toro Reelmaster 3100-D Service Manual page 156

Removing the Piston Pump/Hydrostat
Hydraulic System: Service and Repairs
1. Park machine on a level surface. Lower cutting units, stop engine and
engage parking brake. Remove key from the key switch.
2. Raise and support hood.
Before disconnecting or performing any work on the hydraulic
system, all pressure in the system must be relieved. See
Hydraulic System Pressure (page
3. Remove pump drive belt (see
5–75)).
4. Remove neutral arm assembly (see
5. Thoroughly clean the hydraulic hose ends and fittings on piston
pump/hydrostat and gear pumps to prevent hydraulic system contamination.
6. Disconnect the suction hose from the barbed fitting on the bottom of the gear
pump and drain hydraulic tank into a suitable container.
7. Label all hydraulic hoses and fittings for assembly purposes.
8. Disconnect all hydraulic hoses connected to the hydraulic fittings on the
piston pump/hydrostat and gear pump. Allow hoses to drain into a suitable
container. Plug hose and fitting openings to prevent contamination.
Support pump assembly during removal to prevent them from falling
and causing personal injury or component damage.
9. Support hydraulic pump assembly to prevent it from shifting.
10. Remove both flange head screws and flange nuts that secure pump support
to engine mount.
11. Remove fasteners and spacers securing the pump mount plate to the
engine (Figure 68). Record location of cap screws, washers and spacers for
assembly purposes.
12. Carefully remove pump mount plate with pumps, pulley, pump support and
idler assembly from the machine.
Note: A case drain exists in the piston pump/hydrostat and a suction port
is near the input shaft of the gear pump
is removed from the piston pump/hydrostat, plug both case drain holes to
prevent draining the pumps.
WARNING
5–3).
Removing the Drive Belt (Figure 65) (page
Removing the Neutral Arm (page
CAUTION
(Figure
Page 5–80
Relieving
5–77)).
69). When the gear pump
Reelmaster ® 3100-D/3105-D
20252SL Rev A